Hi, 2017-12-12 21:21 GMT+01:00 Guido van Rossum <gu...@python.org>: > I'm still hoping to accept this PEP, but I don't have time to wrap my head > around -Xdev ("devmode"?) which appears to be Victor's latest pet project. > Should PEP 565 be changed to copy with devmode's behavior, or the other way > around, or should they just ignore each other? It is not clear of me what > the status of the mention in PEP 565 of -Xdev is -- normative or > informational? I really don't want to have to learn how devmode works in > order to be able to accept PEP 565 (or send it back for revision), so I am > asking you two to let me know.
The warnings filters had a few corner cases. We discussed with Nick to fix them to make them simpler. We agreed on these priorities for command line options and environment variables: -b and -bb > -W > PYTHONWARNINGS > -X dev > default filters In release mode, the default filters became: ignore::DeprecationWarning ignore::PendingDeprecationWarning ignore::ImportWarning ignore::ResourceWarning ignore::BytesWarning is gone. We now rely on the fact the BytesWarning should not be emited without -b nor -bb in practice. It has been implemented in https://bugs.python.org/issue32230 ! (I just merged Nick's PR.) Now -X dev behaves again as my initial propopal: for warnings, "-X dev" simply behaves as "-W default". (Previously, I had to hack the code to respect -b and -bb options, but I don't think that it's worth it to explain that here, it's doesn't matter anymore ;-)) The PEP 565 is still different: it doesn't behaves as "-W default", but "-W default::DeprecationWarning:__main__". Only DeprecationWarning warnings are shown, whereas -X dev shows DeprecationWarning, but also PendingDeprecationWarning, ResourceWarning and ImportWarning. Moreover, -X dev shows warnings in all modules, not only __main__. You may see -X dev as a builtin linter, whereas PEP 565 seems to be very specific to one specific issue: display deprecation warnings, but only in the __main__ module. Does it help you to understand the difference? Note: I still dislike the PEP 565, but well, that's just my opinion ;-) Victor _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com